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【结 构 式】

【分子编号】15335

【品名】ethyl 1-[(2'-cyano[1,1'-biphenyl]-4-yl)methyl]-2-ethoxy-1H-benzimidazole-7-carboxylate

【CA登记号】

【 分 子 式 】C26H23N3O3

【 分 子 量 】425.48704

【元素组成】C 73.39% H 5.45% N 9.88% O 11.28%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(VIII)

This compound can be obtained by two related ways: 1) The partial esterification of 3-nitrophthalic acid (I) with ethanol and H2SO4 gives 3-nitrophthalic acid 1-monoethyl ester (II), which is treated with SOCl2 in refluxing benzene to yield the corresponding acyl chloride (III). The reaction of (III) first with sodium azide in DMF and then with refluxing tert-butanol affords 2-(tert-butoxycarbonylamino)-3-nitrobenzoic acid ethyl ester (IV), which is condensed with 4-(2-cyanophenyl)benzyl bromide (V) by means of NaH in THF giving 2-(2'-cyanobiphenyl-4-ylmethylamino)-3-nitrobenzoic acid ethyl ester (VI). The reduction of (VI) with SnCl2.2H2O in ethanol yields the corresponding 3-amino derivative (VII), which is cyclocondensed with ethyl orthocarbonate and acetic acid affording 1-(2'-cyanobiphenyl-4-ylmethyl)-2-ethoxybenzimidazole-7-carboxylic acid ethyl ester (VIII). The reaction of (VIII) with trimethyltin azide in refluxing toluene gives the 2'-(1H-tetrazol-5-yl) derivative (IX), which is saponified with NaOH in ethanol to the corresponding free acid (X). Protection of (X) with trityl chloride and triethylamine in dichloromethane gives the protected compound (XI), which is finally esterified with cyclohexyl 1-iodoethyl carbonate (XII) by means of K2CO3 in DMF. 2) Compound (VIII) can also be obtained by reaction of 2-chloro-1-(2'-cyanobiphenyl-4-ylmethyl)benzimidazole-7-carboxylic acid ethyl ester (XIII) with sodium ethoxide in refluxing ethanol.

1 Naka, T.; Nishikawa, K.; Kato, T. (Takeda Chemical Industries, Ltd.); Benzimidazole derivs., their production and use. EP 0459136; EP 0720982; JP 1992364171; JP 1996099960; US 5196444; US 5328919; US 5401764; US 5703110; US 5705517; US 5962491; US 6004989 .
2 Prous, J.; Mealy, N.; Castaner, J.; TCV-116. Drugs Fut 1993, 18, 7, 609.
3 Obara, Y.; Kubo, K.; Imamiya, E.; Sugiura, Y.; Inada, Y.; Shibaida, Y.; Ishikawa, K.; Yoshimura, Y.; Naka, T.; Synthesis of TCV-116, a new non-peptide angiontensin II (AII) receptor antagonist and its AII antagonist action. 113th Annu Meet Pharmaceut Soc Jpn (March 29-31, Osaka) 1993, Abst 29CC 13-5.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(I) 15328 3-Nitrophthalic acid 603-11-2 C8H5NO6 详情 详情
(II) 15329 2-(ethoxycarbonyl)-6-nitrobenzoic acid C10H9NO6 详情 详情
(III) 15330 ethyl 2-(chlorocarbonyl)-3-nitrobenzoate; 2-Ethoxycarbonyl-6-nitrobenzoyl chloride C10H8ClNO5 详情 详情
(IV) 15331 ethyl 2-[(tert-butoxycarbonyl)amino]-3-nitrobenzoate C14H18N2O6 详情 详情
(V) 15332 4'-(bromomethyl)[1,1'-biphenyl]-2-carbonitrile; 4'-bromomethyl-2-cyanobiphenyl 114772-54-2 C14H10BrN 详情 详情
(VI) 15333 ethyl 2-[[(2'-cyano[1,1'-biphenyl]-4-yl)methyl]amino]-3-nitrobenzoate C23H19N3O4 详情 详情
(VII) 15334 ethyl 3-amino-2-[[(2'-cyano[1,1'-biphenyl]-4-yl)methyl]amino]benzoate 136285-69-3 C23H21N3O2 详情 详情
(VIII) 15335 ethyl 1-[(2'-cyano[1,1'-biphenyl]-4-yl)methyl]-2-ethoxy-1H-benzimidazole-7-carboxylate C26H23N3O3 详情 详情
(IX) 15336 ethyl 2-ethoxy-1-[[2'-(1H-1,2,3,4-tetraazol-5-yl)[1,1'-biphenyl]-4-yl]methyl]-1H-benzimidazole-7-carboxylate C26H24N6O3 详情 详情
(X) 15337 2-ethoxy-1-[[2'-(1H-1,2,3,4-tetraazol-5-yl)[1,1'-biphenyl]-4-yl]methyl]-1H-benzimidazole-7-carboxylic acid C24H20N6O3 详情 详情
(XI) 15338 2-ethoxy-1-[[2'-(1-trityl-1H-1,2,3,4-tetraazol-5-yl)[1,1'-biphenyl]-4-yl]methyl]-1H-benzimidazole-7-carboxylic acid 139481-72-4 C43H34N6O3 详情 详情
(XII) 15339 cyclohexyl 1-iodoethyl carbonate 102672-57-1 C9H15IO3 详情 详情
(XIII) 15340 ethyl 2-chloro-1-[(2'-cyano[1,1'-biphenyl]-4-yl)methyl]-1H-benzimidazole-7-carboxylate C24H18ClN3O2 详情 详情
Extended Information